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The newspaper that William Lloyd Garrison wrote to spread the anti-slavery movement was called "The Liberator." This newspaper was a prominent abolitionist newspaper that Garrison used as a platform to advocate for the immediate and complete emancipation of all enslaved individuals.
Garrison's writing in "The Liberator" was known for its bold and uncompromising stance against slavery, making him a key figure in the abolitionist movement in the United States. The newspaper played a crucial role in raising awareness about the atrocities of slavery and mobilizing public opinion against it.
Therefore, the correct answer to your question is:
D. The Liberator